// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/base_paths.h"
#include "base/command_line.h"
#include "base/debug/crash_logging.h"
#include "base/debug/debugger.h"
#include "base/files/file_path.h"
#include "base/i18n/rtl.h"
#include "base/message_loop/message_loop.h"
#include "base/path_service.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/threading/platform_thread.h"
#include "build/build_config.h"
#include "content/child/child_process.h"
#include "content/common/content_constants_internal.h"
#include "content/common/sandbox_linux/sandbox_linux.h"
#include "content/ppapi_plugin/ppapi_thread.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "ipc/ipc_sender.h"
#include "ppapi/proxy/plugin_globals.h"
#include "ppapi/proxy/proxy_module.h"
#include "ui/base/ui_base_switches.h"

#if defined(OS_WIN)
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
#include "content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.h"
#include "sandbox/win/src/sandbox.h"
#include "third_party/WebKit/public/web/win/WebFontRendering.h"
#include "third_party/skia/include/ports/SkTypeface_win.h"
#include "ui/gfx/font_render_params.h"
#include "ui/gfx/win/direct_write.h"
#endif

#if defined(OS_CHROMEOS)
#include "base/files/file_util.h"
#endif

#if defined(OS_LINUX)
#include "content/public/common/sandbox_init.h"
#endif

#ifdef V8_USE_EXTERNAL_STARTUP_DATA
#include "gin/v8_initializer.h"
#endif

#if defined(OS_POSIX) && !defined(OS_ANDROID)
#include <stdlib.h>
#endif

#if defined(OS_WIN)
sandbox::TargetServices* g_target_services = NULL;
#else
void* g_target_services = 0;
#endif

namespace content {

// Main function for starting the PPAPI plugin process.
int PpapiPluginMain(const MainFunctionParams& parameters)
{
    const base::CommandLine& command_line = parameters.command_line;

#if defined(OS_WIN)
    g_target_services = parameters.sandbox_info->target_services;
#endif

    // If |g_target_services| is not null this process is sandboxed. One side
    // effect is that we can't pop dialogs like ChildProcess::WaitForDebugger()
    // does.
    if (command_line.HasSwitch(switches::kPpapiStartupDialog)) {
        if (g_target_services)
            base::debug::WaitForDebugger(2 * 60, false);
        else
            ChildProcess::WaitForDebugger("Ppapi");
    }

    // Set the default locale to be the current UI language. WebKit uses ICU's
    // default locale for some font settings (especially switching between
    // Japanese and Chinese fonts for the same characters).
    if (command_line.HasSwitch(switches::kLang)) {
        std::string locale = command_line.GetSwitchValueASCII(switches::kLang);
        base::i18n::SetICUDefaultLocale(locale);

#if defined(OS_POSIX) && !defined(OS_ANDROID)
        // TODO(shess): Flash appears to have a POSIX locale dependency
        // outside of the existing PPAPI ICU support.  Certain games hang
        // while loading, and it seems related to datetime formatting.
        // http://crbug.com/155396
        // http://crbug.com/155671
        //
        // ICU can accept "en-US" or "en_US", but POSIX wants "en_US".
        std::replace(locale.begin(), locale.end(), '-', '_');
        locale.append(".UTF-8");
        setlocale(LC_ALL, locale.c_str());
        setenv("LANG", locale.c_str(), 0);
#endif
    }

#if defined(OS_CHROMEOS)
    // Specifies $HOME explicitly because some plugins rely on $HOME but
    // no other part of Chrome OS uses that.  See crbug.com/335290.
    base::FilePath homedir;
    PathService::Get(base::DIR_HOME, &homedir);
    setenv("HOME", homedir.value().c_str(), 1);
#endif

    base::MessageLoop main_message_loop;
    base::PlatformThread::SetName("CrPPAPIMain");
    base::trace_event::TraceLog::GetInstance()->SetProcessName("PPAPI Process");
    base::trace_event::TraceLog::GetInstance()->SetProcessSortIndex(
        kTraceEventPpapiProcessSortIndex);

#ifdef V8_USE_EXTERNAL_STARTUP_DATA
    gin::V8Initializer::LoadV8Snapshot();
    gin::V8Initializer::LoadV8Natives();
#endif

#if defined(OS_LINUX)
    LinuxSandbox::InitializeSandbox();
#endif

    ChildProcess ppapi_process;
    ppapi_process.set_main_thread(
        new PpapiThread(parameters.command_line, false)); // Not a broker.

#if defined(OS_WIN)
    if (!base::win::IsUser32AndGdi32Available())
        gfx::win::MaybeInitializeDirectWrite();
    InitializeDWriteFontProxy();

    double device_scale_factor = 1.0;
    base::StringToDouble(
        command_line.GetSwitchValueASCII(switches::kDeviceScaleFactor),
        &device_scale_factor);
    blink::WebFontRendering::setDeviceScaleFactor(device_scale_factor);

    int antialiasing_enabled = 1;
    base::StringToInt(
        command_line.GetSwitchValueASCII(switches::kPpapiAntialiasedTextEnabled),
        &antialiasing_enabled);
    blink::WebFontRendering::setAntialiasedTextEnabled(
        antialiasing_enabled ? true : false);

    int subpixel_rendering = 0;
    base::StringToInt(command_line.GetSwitchValueASCII(
                          switches::kPpapiSubpixelRenderingSetting),
        &subpixel_rendering);
    blink::WebFontRendering::setLCDTextEnabled(
        subpixel_rendering != gfx::FontRenderParams::SUBPIXEL_RENDERING_NONE);
#endif

    base::RunLoop().Run();

#if defined(OS_WIN)
    UninitializeDWriteFontProxy();
#endif
    return 0;
}

} // namespace content
